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    <title>Document</title>
</head>
<body>
    <script>
        let genorals = [
            {name:"关羽",age:45,weapon:"青龙偃月刀"},
            {name:"张飞",age:40,weapon:"丈八蛇矛"},
            {name:"赵云",age:35,weapon:"不详"},
            {name:"马超",age:31,weapon:"不详"},
            {name:"黄忠",age:80,weapon:"不详"},
        ];
        // let ret = genorals.every(function(item,idx){
        //     return item.age>30
        // })
        let ret = genorals.every((item,idx)=>item.age>30);
        console.log(ret)
    </script>
</body>
</html>